UA 3884 then AA 1632 at O'Hare
Melbourne (Florida) → Chicago → Tucson
Timetable, Chicago time
01:06UA 3884 from Melbourne (Florida) at the gate
20:56AA 1632 to Tucson leaves the gate
19 h 50 apart on the timetable
AA 1632 leaves 19 h 50 after UA 3884 arrives on the timetable: more than half a day, so not a connection we count.